Jazmine Santiago used the school's money to purchase a treadmill, elliptical machine, bench press, pull-up bar and thigh equipment for a private room on the third floor of PS 269 elementary school in Brooklyn.

The school has underperformed during Santiago's four years as principal. In 2014, 12 percent of students passed their math exams, while 16 percent passed the state's English tests.

When teachers reportedly asked Santiago about the gym, she said that she shared the equipment with older students. The school, however, only goes up to the fifth grade.

Another teacher told the New York Post, "She comes in early, she goes to the gym. Even when class is in session, she's still in the gym."

Mike Johnson, whose stepson is in the third grade at the school, said, "That's not right at all ... The funds should go to helping school issues like going toward bullying campaigns or extracurricular activities. I don't understand how this helps."

A spokesman from the Department of Education said there will be an investigation.